Refactor TURN/STUN config:

- Removed ?transport=udp from Nextcloud Talk TURN server definitions
- Dropped --no-tcp-relay to allow TCP fallback
- Removed invalid UDP mapping on TLS port
- Introduced switch between REST secret auth and lt-cred-mech via COTURN_USER_AUTH_ENABLED
- Added user_auth_enabled flag in coturn config for flexibility

See: https://chatgpt.com/share/68d7d601-3558-800f-bc84-00d7e8fc3243

roles/web-svc-coturn/config/main.yml

@@ -6,14 +6,15 @@ server:
 docker:
   services:
     coturn:
-      image:            "coturn/coturn"
-      version:          "latest"
-      cpus:             1.0
-      mem_reservation:  512m
-      mem_limit:        1g
-      pids_limit:       256
-      network_mode:     host
+      image:              "coturn/coturn"
+      version:            "latest"
+      user_auth_enabled:  false
+      cpus:               1.0
+      mem_reservation:    512m
+      mem_limit:          1g
+      pids_limit:         256
+      network_mode:       host
     redis:
-      enabled:  false
+      enabled:            false
     database: 
-      enabled:  false
+      enabled:            false

roles/web-svc-coturn/templates/docker-compose.yml.j2

@@ -10,7 +10,6 @@
       - "{{ COTURN_STUN_TURN_PORT }}:{{ COTURN_STUN_TURN_PORT }}/udp"
       - "{{ COTURN_STUN_TURN_PORT }}:{{ COTURN_STUN_TURN_PORT }}/tcp"
       - "{{ COTURN_STUN_TURN_PORT_TLS }}:{{ COTURN_STUN_TURN_PORT_TLS }}/tcp"
-      - "{{ COTURN_STUN_TURN_PORT_TLS }}:{{ COTURN_STUN_TURN_PORT_TLS }}/udp"
       - "{{ COTURN_RELAY_PORT_RANGE }}/udp"
 {% include 'roles/docker-container/templates/networks.yml.j2' %}
 {% endif %}
@@ -18,10 +17,13 @@
       - "{{ COTURN_TLS_CERT_PATH }}:{{ COTURN_TLS_CERT_PATH }}:ro"
       - "{{ COTURN_TLS_KEY_PATH }}:{{ COTURN_TLS_KEY_PATH }}:ro"
     command: >
-      --use-auth-secret
-      --static-auth-secret="${COTURN_STATIC_AUTH_SECRET}"
+{% if COTURN_USER_AUTH_ENABLED | bool %}
       --lt-cred-mech
       --user="${COTURN_USER_NAME}:${COTURN_USER_PASSWORD}"
+{% else %}
+      --use-auth-secret
+      --static-auth-secret="${COTURN_STATIC_AUTH_SECRET}"
+{% endif %}
       --log-file=stdout
       --external-ip={{ networks.internet.ip4 }}
 {% if networks.internet.ip6|default('') %}
@@ -33,7 +35,6 @@
       --stale-nonce
       --no-multicast-peers
       --no-cli
-      --no-tcp-relay
       --listening-port={{ COTURN_STUN_TURN_PORT }}
       --tls-listening-port={{ COTURN_STUN_TURN_PORT_TLS }}
       --min-port={{ COTURN_RELAY_PORT_START }}

roles/web-svc-coturn/vars/main.yml

@@ -23,6 +23,7 @@ COTURN_RELAY_PORT_RANGE:    "{{ COTURN_RELAY_PORT_START }}-{{ COTURN_RELAY_PORT_
 COTURN_USER_NAME:           "{{ applications | get_app_conf(application_id, 'username') }}"
 COTURN_USER_PASSWORD:       "{{ applications | get_app_conf(application_id, 'credentials.user_password') }}"
 COTURN_STATIC_AUTH_SECRET:  "{{ applications | get_app_conf(application_id, 'credentials.auth_secret') }}"
+COTURN_USER_AUTH_ENABLED:   "{{ applications | get_app_conf(application_id, 'docker.services.' ~ entity_name ~ '.user_auth_enabled') }}"
 
 ## Certificates
 COTURN_TLS_CERT_PATH:       "{{ [ LETSENCRYPT_LIVE_PATH, ssl_cert_folder, 'fullchain.pem' ] | path_join }}"